Volume 10 Issue 3 ( September 2023 )

Indonesia is currently embracing electric vehicle technology for widespread use and mass production, with hybrid vehicles serving as a crucial intermediary in the transition towards full electric vehicle adoption, as outlined in the roadmap established by the Indonesian Government through the Ministry of Industry. Hybrid vehicles integrate an internal combustion engine and an electric motor as the powertrain system, enabling the charging of the battery through the combustion engine while also serving as the primary mover, with charging and discharging cycles contingent upon the vehicle's operational conditions. This research investigates the impact of battery conditions on the fuel economy of two hybrid vehicles during a UN ECE R101 test cycle. This research focusing on two specific battery conditions: a state of charge (SoC) of 50% and 100%. Remarkably, the results indicate that vehicles with a SoC of 100% exhibit a noteworthy enhancement in fuel economy, achieving an improvement of up to 16% compared to those with a SoC of 50%. These findings shed light on the significant role that battery conditions play in optimizing fuel efficiency within hybrid vehicles, ultimately contributing to the ongoing advancements in sustainable transportation and the realization of the Indonesian Government's electric vehicle roadmap.

Keywords: Hybrid vehicle, fuel economy, UN ECE R101, state of charge (SoC)